1. 谷歌云端硬盘：
Google Drive 是 Google 提供的文件存储和同步服务。它允许用户存储文件和个人数据并共享文件。它提供 15 GB 的免费存储空间。它由 Google 于 2012 年推出。几乎每个与互联网有关的人都在使用它。每个人都用它来存储一些专业和个人数据。
2. 糖同步：
SugarSync 是 J2 Global 提供的云服务和文件同步服务。它可以主动同步计算机系统和其他设备中的文件，以进行备份、访问和共享。它受 Windows、macOS、iOS 和 Android 操作系统支持。它由 J2 Global 于 2009 年推出。它不提供免费存储空间。它为付费用户提供有限和无限的存储空间。
Google Drive 和 SugarSync 的区别：
| GOOGLE DRIVE | SUGARSYNC |
|---|---|
| It is owned by Google LLC. | It is owned by J2 Global. |
| It was launched in 2012. | It was launched in 2009. |
| It was developed by Google. | It was developed by J2 Global. |
| It offers 15 GB free storage space. | It does not offer free storage space. |
| It provides limited maximum storage space for paid. | It provides limited as well as unlimited maximum storage space for paid. |
| The number of users using Google Drive is more. | The number of users using SugarSync is less. |
| It supports file versioning. | It also supports file versioning. |
| Maximum storage size is 30 TB here. | Maximum storage size is 60 GB for personal paid and unlimited for professional paid. |
| It has no traffic or band-width limit. | It has traffic or band-width limit of 10 GB per day for free and 250 GB per day for paid. |
| Maximum file size is 5 GB here. | Here maximum file size is not restricted. |
| It charges comparatively more for additional storage that means it is more costly. | It charges less for additional storage that means it is less costly. |
| It provides full security of data. | It provides less security of data than Google drive. |
| Developer API is OAuth2. | Developer API is REST. |